Focusing device



Dec. 19, 1922. 1,439,095.

C. E. GODLEY.

FOCUSING DEVICE.

FILED MAY 26, 1922.

gymzvfole STATES I imam orrics.

CHARLES E. GODLEY, OF DETROIT, MICHIGAN, ASSIGNOR TO EDMUNDS & J ONES CORPORATION, OF DETROIT, MICHIGAN, A CORPORATION OF NEW YORK.

FOCUSING nnvron.

Application filed May 26,

To all whom it may concern Be it known that I, CHARLES E. GooLnY, a citizen of the United States, and residing at Detroit, in the county of Wayne and State of Michigan, have invented a new and Improved Focusing Device, of which the following is a specification.

This invention relates to means for bringing the active light-producing portion of the filament of the light bulb of a projecting lamp or headlight to the focus of the reflector and to secure it in that position, and its object is to produce a focusing devicewhich shall be simple in construction and easily assembled, which will permit the light bulb to be quickly and accurately adjusted, and which will hold the light bulb in such adj usted position.

This invention consists, in combination with the usual reflector and the combination sleevein which the light bulb is mounted, of spherical clamping means to'form a ball-like enlargement on the connector, and a socket on the reflector to receive the connector and this enlargement. It further consists in a. spherical clamping enlargement for the connector formed of aplurality of parts and in a socket for such enlargement consisting of a threaded thimble extending rearwardly from the reflector and a nut screwed onto the thimble and formed to grip the spherical clamping enlargement so as to rigidly attach the connector sleeve and the 'light bulb therein to the reflector. It also consists in the details of construction illustrated in the accompanying drawing and particularly.

pointed out in the claims.

In the accompanying drawing, Fig. 1 is a rear elevation of a reflector provided with this improved focusing device. Fig. 2 is a. central longitudinal section thereof. Fig. 3 is a plan of the locking nut. ,Fig. 4 is an end view and Fig. 5 is a plan of the spherical clamping members. Fig. 6 is an end view and Fig. 7 1s a plan of the connector sleeve. Fig. 8 is an end view and Fi 9 is a plan of another form of connector s eeve.

Similar reference characters refer to like parts throughout the several-views.

The reflector 1 shown in the drawing may be of the usual paraboloidal ty other desired configuration who is most effective when the active light-giving position of the filament 2 of the light bulb 3 is at some fixed or focal point. Because of or any 1922. Serial No. 563,863.

the irregularities of manufacture, this portion of the filament is not always in the. axis of the base 4 of the bulb nor at the same distance therefrom, so it is desirable that the filament 2 may be adjustable not only longitudinally but transversely of the axis of'the reflector 1.

The connector sleeve 5 is of any desired construction, that shown being formed with bayonet slots 6 to receive the pins 7 on the base 4. On the reflector and attached thereto in any desired manner is a thimble 8 having a threaded outer end to receive the locking nut 9, which is perfectly formed with a knurled band 10 and with a spherical portion 11. The/clamping device for the connector 5 is in the form of a plurality of short segments 12, three being shown in Figs. 4 and 5, the ends of which are cylindricalto fit the connector 5 while their middle portions constitute a zone of a sphere when fit- I bed on the connector. As connectors are practically all of standard diameter, these clamping members 12 can be produced in quantities.

The spherical portion 11 of the locking nut fits these clamping members. It will be noticed in Fig. 2 that the inner diameter of the outer end of the thimble 8 is less than the outer diameter of the ball on the connector formed by these clamping members. It maybe said that this thimble, the locking nut and the clamping members constitute a ball-andsocket joint between the connector and'the loose in connectors. It is then advisable to grip them more tightly which may be accomplished by slotting the connectors longitudinally so they can be clamped onto the bases of the bulbs. In Figs. 6 and 7 I have shown the connector 15 formed with a slot 16 constituting an extension of the bayonet slot 17 and extending across the end 18 of the connector. In Figs. 8 and 9 the slots 19 in the connector 20 are three in number, oneof them being an. extension of one of the bayonet slots' 21. The slots 19 do not extend to the closed end of the connector 22.

The details of construction and the proportions of the parts may all'be changed by those skilled in the art Without departing from the spirit of my invention as set forth slot to permit said end to be compressed onto the base of the light bulb, compressible spherical means mounted on the connector sleeve, and means to adjustably support the connector sleeve comprising a device to compress said spherical means onto the connector sleeve to secure the connector sleeve in position and thereby compress the connector sleeve onto the light bulb base.

2. In a focusingdevice', thecombination of a reflector, of a headlight, a thimble extending therefrom and having a threaded outer end, a connector extending through the thimble and adapted to receive a light bulb Within "its forward end, clamping members on the connector, and a nut on the thimble to force the clamping members into said thimble to compress them onto the connector, said connector having a longitudinal slot to permit the connector to be compressed onto the base of the light bulb.

CHARLES E. GODLEY. 

